Horizontal sound box



FIG. 1 is a front elevational view of a horizontal sound box showing ournew design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a first perspective view thereof;

FIG. 8 is a second perspective view thereof; and,

FIG. 9 is a third perspective view thereof.

The broken lines showing features of the horizontal sound box form nopart of the claimed design.

CLAIM The ornamental design for a horizontal sound box, as shown anddescribed.